Improvement in shade-supporters



J. GRAPE'. Shade-Supporter..

No. 218,378. Paten-ted Aug I2, 1879.

N FErERSY FHOTO-UTHDGRAPHER. WASHINGTON. D c.

UNITED STATES PATENT FFICE` JOHN GRAFF, OF NEW YORK, N. Y., ASSIGNOR TO CORNELIUS 86 OO., OF PHILADELPHIA, PA.

IMPROVEMENT IN SHADE-SUPPORTERS.

Specification forming part of Letters Patent No. 218,378, dated August 12, 1879; application filed May 19, 1879.

York city, State of New York, have invented a new and useful Improvement in Shade-Supporters, of which the following is a full, clear, and true description, reference being had to the accompanying drawings, forming part hereof, in which- Figure lis a central sectional elevation of the holder applied to the shade, the latter being-but partially represented; and Fig. 2 a horizontal section of thev same, viewed from above, the section being supposed in the plane of the clamping-screws.

Similar letters of reference indicate corresponding parts wherever used.

invention relates to wall-brackets and other supporters which are employed to hold glass or other shades-such, for instance, as are used in connection with Argand burners, lamps, or the like; and it has especial reference to the brackets designed to support the conical shades of the lights of railroad-cars.

It relates more specifically to that subdivision of the above class which hold the shade from the top or neck, as opposed to those which support a shade from the base.

It consists in a top-supporter embodying in its construction a clamping device to seize and retain the shade, and a locking device to retain said clamping device in position against and upon the shade, all substantially as hereinafter set forth and claimed.

In the drawings, A represents the neck or top portion of a common conical shade; a a', the neck-beads upon the saine. B is the cap of the holder, having an inclosing-shell of light metal or other fit material, perforated at b b to permit the escape of the heat. C is the clampcollar, a cylinder projected downward from the cap, and connected thereto. It is suitably shaped and ornamented upon its exterior, and is provided upon its interior with ribs c c', corresponding in position to the beads upon the neck of the shade, which ribs form between them a circular recess, D, within which is placed the clamp E.

The clamp E consists of a curved springplate corresponding to the recess D, and extending in length to, preferably, about threequarters the extent thereof. At its central portion the clamp has a swivel-connection with a clamp-screw, F, which latter is threaded through a double bearing, Gr, affixed to the ex? terior of the collar C. At its extremities the clamp bears against two opposing inclines, H H', formed within the recess D.

Toes e e upon the extremities of the clamp have a slide-bearing in grooves h h', seated within the inclines H H', the object of such arrangement being for convenience in maintaining the lateral position ofthe clamp.

The clamp is formed of elastic material, and is compressed when first put in place, so that its tendency is to press constantly outward against the recess, except when compressed inwardagainst the shade by means of the clamp-screw F.

I is a lock-nut, threaded upon the shank of the clamp-screw F, between the heads g g of the bearing G, the object of which lock-nut is, by its wedging action when tightened up against either head of the bearing, to lock the clamp-screw in any given position. J is the socket upon the collar C, to which a bracket, arm, or other support for the holder is secured.

In the application of the shade, the locknut being irst loosened and the clamp-screw screwed back, so as to draw the clamp into the recess, (the elasticity of the clamp aiding in the same,) the shade is inserted within the holder, as represented in Fig. 1. The clampscrew is then screwed up, so as to force the clamp out of its recess against the neck of the shade and into the depressed portion thereof which is between the beads a a,'the inclines h h' aiding the above action by projecting the extremities of the clamp away from the recess and against the neck of the shade. The locknut I is then screwed up against the head g of the bearing G, and the shade thus tightly secured in place. In removing the shade the action is reversed.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States- 1. The combination, with the collar-piece G of the shade-holder B, provided with recess D, of a one piece spring-clamp, E, located within said recess of the collar-piece, and connected E, provided with the clamp-screw F, and the shade A, substantially as described.

In testimony whereof I have hereunto signed my name this 16th day of May7 A. D. 1879.

J CHN GRAFF.

In the presence of- EDWARD A. C. KAYSEL, J ULIUs KAYSEL. 

